2006 Toyota 4runner

Family: 4Runner · filed with NHTSA as 4RUNNER

Summary

Of the 338 complaints that name a component, 42% concern Body & Structure (143).
These are complaint counts, not failure rates: they are not divided by how many cars were sold, because no public source reports U.S. sales by model year.
Not enough history to compare this year with the rest of its generation.
5 recalls filed for this model year.
2 federal defect investigations cover this model year.

At a glance

Owner complaints: 381
Recalls: 5
Investigations: 2
NCAP overall: Not rated
Combined MPG: 16–18
Annual fuel cost: $3,450–$3,900
Median mileage at complaint: 102,000 mi (n = 270)
Crashes / fires / injuries / deaths: 28 / 3 / 18 / 0

What owners report

Body & Structure

143 complaints · 42% of complaints that name a component · median 127,456 mi (n = 96)

Owner report Frame is rotting away. The tacomas, tundras, sequoia were recalled for this issue. The tacomas frame is very close in design to the 4runner. The main difference is the 4runner uses coil springs whereas the tacoma used leaf springs. Toyota stated that because the 4runner was made in Japan unlike the others that were mad…

Owner report The frame under the car rusted so much that the gas tank literally fell through the frame to the ground. This put my son at risk and fortunately he was able to pull over in a residential area and exit the vehicle. A mechanic and welding company both assessed the vehicle and acknowledged the u unusual and excessive r…

Suspension

65 complaints · 19% of complaints that name a component · median 125,000 mi (n = 45)

Owner report My car is a 2006 Toyota 4Runner. This past summer I had a tire leaking and took it to the garage for repair. The mechanic stated that the frame is rusting out in the front right, tire rod area, and saw a pinhole. Last week I took the vehicle to get a transmission oil change. That mechanic saw that there's more rust t…

Owner report I have a 2006 Toyota 4Runner. I also have a 2005 GMC Sierra, but this 4Runner's frame is absolutely toast, while the GMC is completely fine. Toyota issued recalls on the tacoma, tundra, and the sequoia, so why not the 4Runner? My car started swaying and violently shaking on the highway. I pulled over and looked underne…

Brakes

34 complaints · 10% of complaints that name a component · median 80,600 mi (n = 26)

Owner report Corrosion of pistons in front brake calipers results in an increase in braking stopping distance. Everytime the front brake pads are replaced the same issue is encountered, defect has taken place three times. In the four piston brake caliper the inside pistons on both the left and right caliper are frozen in place .…

Owner report BRAKE CALIPERS SEIZE OFTEN. I HAVE BEEN THROUGH 12 DIFFERENT CALIPERS IN 160K MILES. THE FRAME HAS AN ALARMING AMOUNT OF RUST FOR A VEHICLE WHICH I HAVE TAKEN VERY GOOD CARE OF.

11% of complaints name no specific component and are left out of the shares above.

Across the generation (2003–2009)

To compare years fairly, each year is counted over the same span: complaints received up to two calendar years after its model year. A year is compared only when that span is over and it holds at least 50 complaints.

Model year	All complaints	First three years	Note
2003	696	161
2004	678	70
2005	425	33	not compared
2006	381	37	not compared
2007	154	23	not compared
2008	96	30	not compared
2009	22	11	not compared

Recalls

Whether a recall has been fixed on a specific car depends on its VIN; check it at nhtsa.gov/recalls.

16V396000 · SEATS:FRONT ASSEMBLY:SEAT HEATER/COOLER

Filed 2016-06-02 · 7,749 vehicles

Defect: Southeast Toyota Distributors, LLC (SET) is recalling certain 2005-2011 4Runner, Highlander, Sequoia, and Sienna, 2005-2010 Avalon and Tundra, 2006-2008 Camry Solara, 2006-2010 Highlander hybrid, 2006-2011 Rav4 and Tacoma, 2007-2010 FJ Cruiser, 2007-2011 Camry hybrid, 2009-2010 Venza, 2010-2012 Prius, 1988-1990 and 2005-2010 Camry, and 1989 and 2009-2010 Corolla vehicles equipped with aftermarket accessory seat heaters with a copper strand heating element. The electrical wiring in the seat heaters may be damaged when the seat cushion is compressed.

Risk: If damaged, the copper strand heating element may short circuit, increasing the risk of a fire.

Remedy: SET will notify owners, and dealers will disconnect the seat heaters, free of charge, and refund the purchase price of the seat heater accessory. The recall began on July 14, 2016. Owners may contact SET customer service at 1-866-405-4226. SET number for this recall is SET16B.

16V065000 · AIR BAGS:SIDE/WINDOW

Filed 2016-02-05 · 320,409 vehicles

Defect: Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain model year 2003-2006 Toyota Land Cruiser and Lexus LX470, 2005-2006 Toyota Tundra and Sequoia, 2004-2006 Toyota 4Runner and Lexus GX470 vehicles equipped with side curtain-shield-air bags. The affected vehicles have an air bag control module that may be improperly programmed, causing the side curtain-shield-air bags to deploy inadvertently.

Risk: If the side curtain-shield-air bags deploy unexpectedly, it can increase the risk of occupant injury.

Remedy: Toyota will notify owners, and dealers will replace the air bag control module with one that has improved programming, free of charge. The recall began on December 1, 2016. Owners may contact Toyota customer service at 1-888-271-9371. Toyota's number for this recall is G0C and GLB.

11V113000 · VEHICLE SPEED CONTROL:ACCELERATOR PEDAL

Filed 2011-02-24 · 1,363,244 vehicles

Defect: TOYOTA IS RECALLING CERTAIN MODEL YEAR 2008 THROUGH 2011 LEXUS LX570, 2003 THROUGH 2009 TOYOTA 4RUNNER, AND 2006 THROUGH 2010 RAV4 VEHICLES. THE ACCELERATOR PEDAL CAN GET STUCK IN THE WIDE OPEN POSITION DUE TO ITS BEING TRAPPED BY AN UNSECURED OR INCOMPATIBLE DRIVER'S FLOOR MAT.

Risk: A STUCK OPEN ACCELERATOR PEDAL MAY RESULT IN VERY HIGH VEHICLE SPEEDS AND MAKE IT DIFFICULT TO STOP THE VEHICLE, WHICH COULD CAUSE A CRASH, SERIOUS INJURY OR DEATH.

Remedy: THE REMEDY IS NOW AVAILABLE. THE SAFETY RECALL BEGAN EARLY APRIL 2011. THE REMEDY WILL INVOLVE MODIFICATION OR REPLACEMENT OF THE ACCELERATOR PEDAL AND REPLACEMENT OF ANY TOYOTA ALL-WEATHER FLOOR MAT. OWNERS MAY CONTACT TOYOTA AT 1-800-331-4331 OR LEXUS AT 1-800-255-3987.

10V035000 · EQUIPMENT:OTHER:LABELS

Filed 2010-02-03 · 271,417 vehicles

Defect: GULF STATES TOYOTA IS RECALLING CERTAIN MODEL YEAR 2005-2010 VEHICLES FOR FAILING TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 110, "TIRE SELECTION AND RIMS." THESE VEHICLES WERE SOLD BETWEEN SEPTEMBER 1, 2005 AND JUNE 2, 2008 WITHOUT THE REQUISITE LOAD CARRYING CAPACITY MODIFICATION LABELS.

Risk: THIS DOES NOT MEET THE STANDARD REQUIREMENTS.

Remedy: DEALERS WILL MAIL TO CONSUMERS THE CORRECTED LABEL OR THE CUSTOMER WILL HAVE THE OPTION FOR DEALERS TO INSTALL THE LABEL FREE OF CHARGE. DEALERS WILL ALSO CORRECT THE OWNER'S MANUAL. THE SAFETY RECALL BEGAN ON MAY 27, 2010. OWNERS MAY CONTACT GULF STATES TOYOTA AT 713-580-3300.

10V036000 · EQUIPMENT:OTHER:LABELS

Filed 2010-02-03 · 153,418 vehicles

Defect: SOUTHEAST TOYOTA IS RECALLING CERTAIN MODEL YEAR 2005-2011 PASSENGER VEHICLES FOR FAILING TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 110, "TIRE SELECTION AND RIMS." THESE VEHICLES WERE SOLD WITHOUT THE REQUISITE LOAD CARRYING CAPACITY MODIFICATION LABELS.

Risk: A DRIVER MAY OVERLOAD A VEHICLE WHICH MAY INCREASE THE RISK OF A CRASH.

Remedy: DEALERS WILL MAIL TO CONSUMERS THE CORRECTED LABEL OR THE CUSTOMER WILL HAVE THE OPTION FOR DEALERS TO INSTALL THE LABEL FREE OF CHARGE. THE SAFETY RECALL BEGAN ON MAY 27, 2010. OWNERS MAY CONTACT SOUTHEAST TOYOTA AT 1-800-301-6859.

Federal investigations

Action	Component	Opened	Closed	Recall
DP18002	STRUCTURE:FRAME AND MEMBERS	2018-08-17	2022-03-18
RQ10003	ELECTRICAL SYSTEM:SOFTWARE	2010-02-16	2011-03-01	11V112000

DP18002: Frame corrosion

RQ10003: Unintended and Uncontrolled Acceleration

Engines and fuel economy

Version	Engine	Transmission	Drive	City	Hwy	Combined	Fuel cost / yr
4Runner 2WD	4.0L 6cyl	Automatic 5-spd	Rear-Wheel Drive	16	20	18	$3450
4Runner 2WD	4.7L 8cyl	Automatic 5-spd	Rear-Wheel Drive	15	18	16	$3900
4Runner 4WD	4.0L 6cyl	Automatic 5-spd	4-Wheel or All-Wheel Drive	15	19	17	$3650
4Runner 4WD	4.7L 8cyl	Automatic 5-spd	4-Wheel or All-Wheel Drive	14	18	16	$3900

Fuel cost is EPA's estimate at the fuel prices of its last update, not today's.

Crash test ratings (NCAP)

Variant	Overall	Frontal	Side	Rollover
2006 Toyota 4Runner 4-DR.	Not Rated	Not Rated	Not Rated	★★★☆☆

Service bulletins

Toyota issued 199 service bulletins listed against this model year, most often about equipment.

A bulletin tells dealers how to fix a known condition. It is not a recall and not a defect finding. Most bulletins cover several model years at once, so one listed here may not be specific to this year. The number of bulletins tracks how long and how widely a model was sold, so it is not a measure of reliability.

Date	Component	Summary
2026-01-07	UNKNOWN OR OTHER	Some 2005 – 2026 Toyota vehicles that have undergone water intrusion may exhibit a condition in which a musty odor is present. Follow the procedures in this bulletin to remediate the odor and address this condition. The purpose of this Serv…
2024-12-06	STRUCTURE:BODY	Acid rain results from rainwater or other airborne moisture that become acidic due to industrial chemical impurities in the atmosphere. If these acidic compounds settle on an exposed vehicle, especially the horizontal areas such as the hood…
2024-12-06	STRUCTURE:BODY	To prevent brake rotor rust from forming during transportation and storage, wheel film will be used instead of a cardboard type of anti-rust cover. The purpose of the wheel film is to shield the disc brake rotor from weather elements and in…
2024-12-06	STRUCTURE:BODY	The condition known as acid rain is caused by airborne chemicals or particles in the atmosphere, which mix with rainwater, nighttime dew, or high humidity to form acidic compounds. If these contaminants settle and remain on a painted vehicl…
2024-12-05	STRUCTURE:BODY	Toyota vehicles are currently protected with RapgardTM protective film designed to protect the horizontal painted surfaces. This material protects from acid rain, environmental fallout, and rail contamination. Follow the Removal Procedure …
2024-12-03	STRUCTURE:BODY	Vehicles may occasionally be subjected to contamination by airborne iron particles shed from railroad tracks, train wheels, exposure to heavy machinery facilities, grinding, welding, etc. This type of contamination can be identified by the …
2024-07-29	STRUCTURE:BODY	Some 2005 – 2024 Toyota vehicles that have undergone water intrusion may exhibit a condition in which a musty odor is present. Follow the procedures in this bulletin to remediate the odor and address this condition. The purpose of this Serv…
2024-07-29	STRUCTURE:BODY	Some 2005 – 2024 Toyota vehicles that have undergone water intrusion may exhibit a condition in which a musty odor is present. Follow the procedures in this bulletin to remediate the odor and address this condition. The purpose of this Serv…
2024-07-12	STRUCTURE:BODY	Acid rain results from rainwater or other airborne moisture that become acidic due to industrial chemical impurities in the atmosphere. If these acidic compounds settle on an exposed vehicle, especially the horizontal areas such as the hood…
2024-07-12	STRUCTURE:BODY	To prevent brake rotor rust from forming during transportation and storage, wheel film will be used instead of a cardboard type of anti-rust cover. The purpose of the wheel film is to shield the disc brake rotor from weather elements and in…

How to read this page

Complaint counts are not failure rates. A model that sells more cars draws more complaints, and owners file more often after news coverage or a recall. That is why this page compares a model year only with other years of the same generation, never with other models.

Each complaint is counted once, even when it names several components; a complaint that names several systems appears under each of them. Owner reports are quoted as filed and have not been verified by NHTSA or by us.

Every model year of this 4Runner, including the ones without a page of their own, is listed on the Toyota 4Runner model page.

Sources

NHTSA Office of Defects Investigation: complaints, recalls and investigations (bulk files, data as of 2026-10-28).
NHTSA New Car Assessment Program: crash test ratings.
U.S. EPA / DOE fueleconomy.gov: engines, transmissions and fuel economy.

MotorAlmanac is independent and not affiliated with NHTSA, EPA or any manufacturer. This page summarises public records; it is not a mechanical inspection. Before buying a used car, check its VIN for open recalls and have it inspected.